84 lines
2.2 KiB
Go
84 lines
2.2 KiB
Go
/*
|
|
Copyright 2020 The cert-manager Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package log
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/onsi/ginkgo"
|
|
"k8s.io/apimachinery/pkg/util/wait"
|
|
)
|
|
|
|
var Writer = ginkgo.GinkgoWriter
|
|
|
|
func nowStamp() string {
|
|
return time.Now().Format(time.StampMilli)
|
|
}
|
|
|
|
func log(level string, format string, args ...interface{}) {
|
|
fmt.Fprintf(Writer, nowStamp()+": "+level+": "+format+"\n", args...)
|
|
}
|
|
|
|
func Logf(format string, args ...interface{}) {
|
|
log("INFO", format, args...)
|
|
}
|
|
|
|
// LogBackoff gives you a logger with an exponential backoff. If the
|
|
// returned 'logf' func is called too often, the logf calls get ignored
|
|
// until the backoff expires.
|
|
//
|
|
// The reason we use this backoff mechanism is that we have many "waiting
|
|
// loops" that poll every 0.5 seconds. We don't want to use a higher
|
|
// polling interval since it would slow the test.
|
|
//
|
|
// The first log line is immediately printed, and the last message is
|
|
// always printed even if the backoff isn't done. That's because the first
|
|
// and last messages are often helpful to understand how things went.
|
|
func LogBackoff() (logf func(format string, args ...interface{}), done func()) {
|
|
backoff := wait.Backoff{
|
|
Duration: 5 * time.Second,
|
|
Factor: 1.2,
|
|
Steps: 10,
|
|
Cap: 1 * time.Minute,
|
|
}
|
|
|
|
start := time.Now()
|
|
var msg string
|
|
done = func() {
|
|
Logf(msg + fmt.Sprintf(" (took %v)", time.Since(start).Truncate(time.Second)))
|
|
}
|
|
|
|
once := sync.Once{}
|
|
step := time.Now()
|
|
return func(format string, args ...interface{}) {
|
|
msg = fmt.Sprintf(format, args...)
|
|
once.Do(func() {
|
|
Logf(msg)
|
|
})
|
|
|
|
if time.Since(step) < backoff.Duration {
|
|
return
|
|
}
|
|
|
|
step = time.Now()
|
|
_ = backoff.Step()
|
|
Logf(msg)
|
|
}, done
|
|
}
|